Improved composition for roofing and paving



i To all 'whom it mayconcern:

und

GIACINTO BARTOLOME'L- or CHICAGO, iLLINois.

Letters `Patent No. 95,071, dated September 21, 1869.

IMPROVE!) COMPOSITION FOR ROOFING- AND PAVING.

The Schedule referred-bbl these Lett Be it known thf t I, Greenrro` BARTOLOMEI, of the city of Chicago, county of (look, and State of Illinois,

havevinvented'a certain Composition for Roofing and Paving. j i

vThe nature of my'invention consists in mixing, in certain proportions, the diii'erent ingredientsstoneflour, sand, and cbal-'tar-so as to make a composition which has the strength and durability of stone, to be .used for the purpose of rooting, paving, and other pur'- poses.

Ot' these ingredients, the stone-flour consists of limestone, pulverized or ground without burning or calciuing, as burningitwill make it int'lime, which spoils it for the purpose I use 'itfolz` i The sand canbe 'of any quality, but I muoh prefer `that which is fine, as it will mix better.

The coal-tar IJ use 'is the lcommon artic-le of tar known under that name.

These ingredients Iuse in the following proportions, viz: y

Stone-flour, three barrels; Y Sand, one and one-half barrel; and

' Coal-tar, one barrel.

After the articles named are arranged inthe above i proportion, in order toy mix` them, I first place the coalers Patent and making part of the samet tar in a kettle, orany suitable vessel that can be used, for the 4purpose of boiling it. Aftenthe coal-tar has boiled about two hours, I then take the stone-fionr and sand, already mixed, and stir them into the boiling coal-'tannutil all tnree of the ingredients are thoroughlymixed together. I then boil the mixture about four hours. ,'lliis, when allowed to cool, will form a substance as strong and compact as stone, and very nearly as hard as iron, and,fwhen placed on a roof, will be found to resist a vast amount of wear.

If it is found that this proportion makes a; harder l Witnesses: A

E. A. WEST, L. L. Bom). 

